Overview
- Oral argument on Monday produced sharp splits among eight justices and Justice Samuel Alito’s recusal left a real chance of a 4–4 tie that would leave the Colorado Supreme Court’s decision allowing Boulder’s suit to proceed in place.
- Lawyers for ExxonMobil and Suncor argue federal law bars state tort claims by invoking the Clean Air Act and constitutional limits on states suing over interstate or foreign emissions while the Department of Justice backed the companies at argument.
- Boulder says it seeks local cost recovery for wildfire, flood and public-health spending and alleges the companies misled the public about fossil-fuel risks rather than trying to regulate production.
- Justices pressed two threshold questions — whether federal preemption applies and whether the Supreme Court should decide the merits now or send the case back as premature — so the Court could rule for preemption, allow the claims, or avoid the merits.
- A ruling for Boulder or a 4–4 tie would let similar municipal and state suits move forward and could widen discovery and liability exposure for fossil-fuel firms while a decision for the companies would shut those cases down nationwide.